Process and apparatus for the manufacture of artificial silk



Jan. 7, H93 IF. LAPPE ,27,@47

PROCESS AND APPARATUS FOR THE MANUFACTURE OF ARTIFICIAL SILK Filed March 24, 1953 Patented Jan. 7, 1936 UNITED STATES ATENT OFFIQE PROCESS AND APPARATUS FOR THE MANU- FACTURE. OF ARTIFICIAL SILK Delaware Application March 24, 1933, Serial No. 662,422 In Germany October 19, 1932 6 Claims.

This invention relates to improvements in the manufacture of filaments of artificial origin, but primarily has .for its object to devise a means whereby a more uniform quality of filament is the result.

Another object of the present invention is to devise a means whereby the take-up and winding of the freshly extruded filaments are carried out as two separate operations.

Still another object of the present invention is to provide a new arrangement of apparatus whereby the spool or bobbin acts as the take-up means and also as the winding or collecting means.

These and other objects will in part become obvious and in part be pointed out in the following specification and by reference to the attached drawing, in which is illustrated a diagrammatic front elevation of the arrangement of my new invention.

Figure 1 is a diagrammatic view of the preferred arrangement of apparatus in my invention;

Figure 2 is a side elevation of a modified form of spool which may be used; and

Figure 3 is a View similar to Figure l of a modified arrangement of the apparatus of my new invention.

Hereto-fore it has been the general practice in the art to use separate mechanically driven rollers with pot spinning machines. The rollers were generally known as Godet wheels and their purpose was to act as a take-up means for drawing the freshly extruded filaments from a bath immediately after extrusion from the spinnerette. The filaments were then collected in a spinning, pot which, because of the speed of rotation of said pot, was able to draw them in by reason of the centrifugal force exerted on the filaments, thereby building up a so-called filament cake.

It is the purpose of the present invention to draw the freshly extruded yarn by means of a spool or bobbin and then lead the filaments to guiding devices, thence returning them to the same spool. By this arrangement the spinning machine may be simplified and improved physical qualities resultant in the yarn.

In the attached drawing in which like numerals of reference indicate like parts, I indicates the filaments which are extruded from a spinnerette 2 and led over a thread guide 3 which may be either stationary or movable. The filaments I then pass over the spool 4 and down to a guiding device 5, then through the movable or reciprocating thread guide 6 which builds up the yarn body on the spool 4. The filaments are then passed around the spool 4 for winding.

The thread guides 3 and 5 may be either stationary or movable or they may be adjustably secured for equalization of tension, but the thread guide 6 is always movable in a reciprocatory manner due to the fact that said thread guide is the one which builds up the wind as hereinbefore brought out.

In the preferred method for take-up of the thread, the thread guide 3 preferably leads the freshly extruded filaments to pass over the yarn body on the spool, the said yarn body acting as a Godet wheel, to pass from there in an extend- 15 ed path to and through a second thread guide, and then passed back to be built up and form a portion of the original yarn body over which it passed when in a freshly extruded state. In this form the thread guide 3 is stationary and leads the thread upon the center of the winding.

The filaments I may also be guided in such a way that they are carried over the spool 4 to the side of the winding. or adjacent thereto. When this is done the spool 4 may be provided with a groove 9 at one end through which the filaments I pass on their way to the thread guide 5. The type of spool described is illustrated in Figure 2 of the drawing.

Figure 3 of the drawing illustrates a modified form of the device. In this arrangement the thread guide 3 is raised to allow the filaments to pass over the spool 4 and be led around an adjacent spool ID. This arrangement can be duplicated for as many spools as the spinning may contain although only two spools are illustrated in the drawing.

Owing to the longer passage of the thread from the spinnerette to the spinning spool caused by the separation of the take-up and winding operation, the thread is wound up in a more coagulated and uniform state.

From the foregoing description, taken in connection with the accompanying drawing it is thought the complete construction, operation, and advantages of my invention will be clearly apparent to anyone skilled in the art to which it refers.

What I claim is:

1. In a process for the manufacture of filaments of artificial origin, the steps of extruding the filaments, passing them to and over a takeup means, then to a guiding device, passing them back to the same take-up means and collecting the filaments thereupon.

2. In a device for the manufacture of filaments ot artificial origin, an extrusion means for spinning the filaments, a thread guide and take-up device associated therewith, another thread guide for receiving the filaments from said take-up device, and a reciprocatory thread guide for guiding the filaments back to the take-up device for collecting the filaments thereupon.

3. In a device for the manufacture of filaments of artificial origin, an extrusion means for spinning the filaments, a thread guide and take-up device associated therewith, said take-up device having a groove over which the yarn is passed, another thread guide around which the yarn is passed, and a reciprocating thread guide for guiding the filaments back to the take-up device for collecting the filaments thereupon.

4. In the manufacture of yarn, thread, filaments, etc., or artificial origin, the steps of extruding the filament, passing it to and over the face of a thread body being built up, guiding it in an extended path of a predetermined length, and returning it to the said thread body to become a portion thereof, succeeding lengths of said artificial bodies being drawn over preceding lengths, and finally going to make up a portion of said thread body.

5. In a device for the manufacture of filaments or yarn of artificial origin, in combination, a spinneret for forming the filaments, a guide situated directly above the said spinneret, a combined drawing and collection device, and thread guide means associated with said last-named device so arranged that filaments passing over the firstnamed guide may then be led over the drawing device, about the second named thread guide means, and back to the drawing device for collection.

6. In a process for the manufacture of filaments of artificial origin, the steps of extruding the filaments, passing them to a collecting means, passing them from said collecting means to a guiding device, then back to a collecting means 20 and winding up the filaments thereupon.

FRIEDRICH LAPPE. 

